Stereoscopic attachment



FIG. 1 is a perspective front view of a stereoscopic attachment, shown with a mobile device;

FIG. 2 is a front elevation view of the stereoscopic attachment, the portions shown in broken lines forming no part of the claimed design;

FIG. 3 is a rear elevation view of the stereoscopic attachment, the portions shown in broken lines forming no part of the claimed design;

FIG. 4 is a left elevation view of the stereoscopic attachment;

FIG. 5 is a right elevation view of the stereoscopic attachment;

FIG. 6 is a top plan view of the stereoscopic attachment; and,

FIG. 7 is a bottom plan view of the stereoscopic attachment.

The mobile device is shown in broken lines for illustrative purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for a stereoscopic attachment, as shown and described. 